Power-press.



N0i8401761. :PATENTED JAHN. 8, 1907.

kH. K. FRBIS. y

'PWER PRESS., APPLIQATION FILED MAY 1o, 190e.

INIIIHIIIIIII UNITED STATES. PATENT OFFIOE.l

` HARBERT K. FOaBIs, OF COLUMBUS, OHIO.

POWER-PRESS.

No. s4o,7e1.

Specicaton of Letters Patent- Patented Jan. 8, 1907.

Application filed May l0, 1906. Serial No. 316,079.

To a/ZZ whom, ti may concern:

Be it known that I, HARBERT K. FORBIs, a citizen of the United States,residing at Columbus, in the county of Franklin and State of Ohio, haveinvented certain new and useful Im rovements in Power-Presses, of whichthe ollowing is a specification.

My invention relates to a power-press articularly adapted for use in themanuacture of turnbuckles. i

The press forming the subject-matter of the present invention isdesigned to punch holes through the heads of turnbuckles,

vwhile at the same time completing the formation of said head.

A further object of the invention is the provision of improved means forejecting the plu s which have'been forced from the heads of t eturnbuckles from the machine.

A further obj ect of the invention is the ing the turnbuckles from thepunch after the operation of punching a hole through lthe head of theturnbuckle. has been completed.

Further objects and advantages of the invention will be set forth in thedetailed description which now follows.

In the accompanying drawings, Figure 1 is a front elevation of anordinary powerpress having the improvements comprising the presentinvention applied thereto, and Fig. 2 is a partial vertical sectionthrough said press upon an enlarged scale.

Like numerals designate corresponding parts in both of the figures ofthedrawings.

Referring to the drawings, the numeral 5 designates the base of thepress. This base is preferably mounted upon legs 6. A

frame 7 is supported-upon the base, and mounted in this frame is a shaft8. 'This shaft carries at one end pulleys 9 and at the other end apinion 10. This pinion meshes with a gear-wheel 11, which is fast upon ashaft 12. A crank 13 is adapted to impart reciprocatory movement to ahead 14 through the medium of a connecting-rod 15 said head slidablyengaging ways 16, formed upon the frame 7. y

The parts so far described are all of the usual and well-knownconstruction in powerpresses and form no part of the present inventionexcept in so far as they enter into the combination of elements whichunitedly` serve the purposes sought.

Thehead 14 is reduced, as at 15', and is cut out, as at 16,for thereception of a die-head 17,

said die-head being held in osition by setscrews 1S. Secured in theie-head 16 by a set-screw 19 is a crowning-die 20, while held inposition in said head by said crowningdieis the die proper, 21. Thereduced portion 15 ofthe head 14 and the die-head are cut out, as at 22,for a purpose which will be hereinafter set forth.

A bar 23, which has its lower end beveled, as at'24, is pivoted, as at25, in the die-head 17. A spring 26, which is located in the recessedportion 27 of vthe die-head, bears against this bar and tends to forceit to the left in Fig. 2. A block 28 is secured by bolts 29 to the base5. Secured to this block is a punch-support 30, the end of which isreduced, as at 31, to such size that said reduced end may enter betweenthe side bars 32 of a turnbuckle. A punch 33 is provided with a flange34, which rests upon the upper surface of the punch-support 30, -andsaid punch is secured in said punch-supportl by a set-screw `35. Anelongated pin 36 iscarried by the crowning-die 20 and travels in anopening 37, formed in the punch-support, by virtue of which constructionthe crowning-die is always held in 'proper alinement with the punch. Awater-supply hose 38 conducts water to a nipple 39, which communicateswith an opening 40, formed through the diehead just above the dieproper, 21. The arms 41 of a U-shaped yoke 42 are secured to the sidesof the die-head, said yoke forming a stripping mechanism, as will behereinafter described.

The operation of the device is as follows: It will be understood thatwhen power is applied to the pulleys 9 reciprocatory motion willbeimparted to the head 14 in the usual manner of power-presses of thischaracter. It will also be understood that this will serve to impartreciprocatory motion to the diehead'and to the stripping mechanismcarried thereby. One end or one head of the turnbuckle having beenheated to a white heat in a furnace, a workman asps said turnbuckle IOOwith a proper tool an places it in the osif gages the head of theturnbuckle and forcessaid turnbuckle bodily downwa'rd. This forces thepunch 33 ,through the head ofthe As the die-head car- I IIO turnbuckleand forms a hole therein. The plug of metal which is thus forced out ofthe ead 43 contacts withthe beveled end 24 of the bar 23 and is causedto fall over and down an inclined face 44, formed by cutting away thedie 21 and the die-head.

It will be understood that it is necessary to provide some means ofpreventing the dies from becoming overheated, which would cause them tolose their temper. For this reason water is fed through the pipe 3S in aconstant stream upon said dies. After the plug of metal has been forcedfrom the head of the turnbuckle the plunger starts upon its upwardmovement. The lower portion of the yoke 42, which rests beneath theturnbuckle, then catches said turnbuckle and forces it upward until itis free of the punch, when it may be removed by the workman. After theturnbuckle is cooled the opposite end or head thereof is heated, and theabovedescribed operation is repeated.

It will be readily understood that the present invention results in thesaving of time and labor. IIeretofore it has been necessary, owing tothe peculiar formation of the turnbuckle, to drill these holes throughthe heads of said turnbuckles. By the present method this operation isperformed at an exceedingly rapid rate. A machine embodying` the presentimprovements is in actual use at this time and satisfactorily performsthis operation of punching these holes in the turnbuckles.

While the elements shown and described are well adapted to serve thepurposes for which they are intended, it is to be under stood that theinvention is not limited to the precise construction set forth, butincludes within its purview suoli changes as may be made within thescope of the appended claims. Y

What I claim isl. In a machine for perforating turnbuckles, a punchadapted to enter between the side bars of a turnbuckle, a reciprocatorydie coacting with said punch, and a stripping` mechanism for strippingthe turnbuckles from said punch.

2. In a machine for perforating turnbuckles, the combination with areciprocatory head, of a die carried by said head, a iXed punch adaptedto enter between the side bars of a turnbu'clile, and a strippingmechanismk carried by said reciprocatory head.

3. In a machine of the character described, the combination with areciprocatory diehead, of a iiXed punch-support having a reduced portionwhich is adapted to enter between the side bars of a turnbuckle, a punchcarried by said reduced portion, a die carried by said reciprocatoryhead, and a stripper mechanism for stripping the turnbuckle from. thepunch.

4. In a machine for perforating turnbuckles, the combination with areciprocatory head, of a die carried in said head, a punch adapted toentei` between the side bars of a turnbuckle, and an ejecting mechanismlocated in said head above the die.

5. In a machine for perfoiating turnbuckles, the combination with areciprocatory head, of a die carried by said head, a stripping mechanismcarried. by said head, and a fixed punch lying directly beneath saiddie, saidv punch being adapted to enter between the side bars of aturiibuckle.

6. In a machine for perforating turnbuckles, a reciprocatory head, afixed punch adapted to enter between the side bars of a turnbuckle, adie carried by said reciprocatory head and coacting with said. punch,and a yielding bar having its lower end. beveled and located in said`head above the die.

7. In a machine for perforating turnbuckles, a recipi'ocatory head, adie carried by said head, and a punch coacting with said die and adaptedto enter between. the side bars of a turnbuclrle, said head being cutaway as and for the purposes set forth.

8. In a device of the character set forth, the combination with areciprocatory head, of a die carried by said head, a fixed punch, and aU-shaped yoke carried by the reciprocatory head, the arms of said yokelying upon each side of said. punch and the lower portion of said yokelying directly beneath said punch.

9. In a machine for perforating turnbuckles the combination with a)uncli adapted to enter between the side bars of the turnbuckle, of adie, and a ieciprocatory stripper mechanism for stripping a turnbucklefrom said punch.

In testimony whereof I alix my signature in presence of two witnesses.

HARBERT K. FORBIS.

fitn esses FRANK G. CAMPBELL, A. L. PiniLrs.

IOO

